From qarac; a knob or belaying-pin (from its swelling form) -- tache.
see HEBREW qarac
H7165. qeres
[קֶ֫רֶס] noun [masculine] hook, on edge of curtains of tabernacle, matching the loops (לֻלָאֹת, see [ לוּלַי]); plural קְרָסִים Exodus 26:6, 11 = 36:13, 18; 26:33; construct זָהָב קַרְסֵי 26:6 = 36:13, ׳ק נְחשֶׁת 26:11 = 36:18; suffix קְרָסָיו 35:11 = 39:33.